Question

A man flies a small airplane from Fargo to Bismarck, North Dakota --- a distance of 180 miles. Because he is flying into a head wind, the trip takes him 2 hours. On the way back, the wind is still blowing at the same speed, so the return trip takes only 1 hour and 48 minutes. What is the plane's speed in still air, and how fast is the wind blowing?

Answer 1

ginst wind, 180 miles in 2 ours, speed=90 MPH... with wind, 1 our 48 min=108 minut=1.8 ours, speed=180/1.8=100 MPH... wind=(100-90)/2=5 MPH... plane speed=85 MPH